安全性能高 高速公路是汽车专用路,禁止其他车辆和行人通行。汽车只准从规定的出入口进出。为了防止穿越和违章进入,高速公路采用立体交叉结构,没有平行交叉;往返车道分别建路,或者设立中间隔离带,以防对向车相撞。单行线一般必须设立两条以上的线路,以便超越事故车辆或低速车辆。在高速公路上,除特殊情况外禁止以任何理由停车、存车。为便于旅客休息和保养车辆,高速公路每五十公里和十五至二十公里分别设立休息场和停车场。由于采取上述措施和不断完善规章制度,高速公路上的交通事故在逐年减少。例如一九六六年的 High safety highway is a car road, prohibit the traffic of other vehicles and pedestrians. Cars only allowed from the entrances and exits. In order to prevent crossings and illegal entry, the highway uses a three-dimensional cross structure, there is no parallel cross; roundabout lanes respectively, or the establishment of the middle isolation zone to prevent the collision of the opposite car. It is generally necessary to set up more than two lines of one-way lines in order to surpass accident vehicles or low-speed vehicles. On the highway, except for special circumstances prohibit parking for any reason, save the car. In order to facilitate passengers to rest and maintain their vehicles, the expressway is provided with a rest place and a parking lot every 50 kilometers and 15 to 20 kilometers respectively. Due to the above measures and continuous improvement of the rules and regulations, traffic accidents on expressways are decreasing year by year. For example, in 1966